Finding the Third Proportional to 508,472 and 689,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   508,472 : 689,788.50 = 689,788.50 : x
2. Step 2: Convert to fraction form
   508,472/689,788.50 = 689,788.50/x
3. Step 3: Cross multiply
   508,472x = 689,788.50 × 689,788.50
4. Step 4: Simplify right side
   508,472x = 475,808,174,732.25
5. Step 5: Solve for x
   x = 475,808,174,732.25/508,472
6. Step 6: Final answer
   x = 935,760.82